20210221010 has 96 divisors (see below), whose sum is σ = 44902356480. Its totient is φ = 6507744768.

The previous prime is 20210221001. The next prime is 20210221019. The reversal of 20210221010 is 1012201202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20210221001) and next prime (20210221019).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20210220982 and 20210221000.

It is not an unprimeable number, because it can be changed into a prime (20210221019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4354271 + ... + 4358909.

It is an arithmetic number, because the mean of its divisors is an integer number (467732880).

Almost surely, 2^20210221010 is an apocalyptic number.

20210221010 is an abundant number, since it is smaller than the sum of its proper divisors (24692135470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210221010 is a wasteful number, since it uses less digits than its factorization.

20210221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20210221010 its reverse (1012201202), we get a palindrome (21222422212).

The spelling of 20210221010 in words is "twenty billion, two hundred ten million, two hundred twenty-one thousand, ten".